<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>登录验证-非常重要</title>
		<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
	    <script>
	    	function checkUname(){
	    		username=$("#uname").val();
	    		//验证规则
	    		reg= /^[a-zA-Z0-9]{3,10}$/;
	    		if(!reg.test(username)){
	    			$("#uname").css("border-color","red");
	    			return false;
	    		}else{
	    			$("#uname").css("border-color","");
	    			return true;
	    		}
	    	
	    	}
	    	function checkUpsw(){
	    		userpassword=$("#upsw").val();
	    		//验证规则
	    		reg= /^[a-zA-Z0-9]{3,6}$/;
	    		if(!reg.test(userpassword)){
	    			$("#upsw").css("border-color","red");
	    			return false;
	    		}else{
	    			$("#upsw").css("border-color","");
	    			return true;
	    			
	    		}
	    	}
	    	function checkAll(){
	    		checkUname();
	    		checkUpsw();
	    	}
	    </script>
	
	
	</head>  
	<body>
		<h3>用户名是字母数字的组合；3-10个；密码6个数字</h3>
		用户名<input onblur="checkUname()" type="text" id="uname" />
		密码<input onblur="checkUpsw()" type="password" id="upsw" />
		<button onclick="checkAll()">登录</button>
	</body>
</html>
